Improvement in bolting flour



i Y W. F. GOGHRANE. Assignor to himself and WARDER 6a CHILD:

BOLTING FLoUR. Y No. 37,317Vr Patented Jan 6, 1863.

. UNITED .STATES- PATENT OFFICE.

`WILLIAM n. oocHnANn, on SPRINGFIELD, onto, `Assienoa To HiMsnLr AND WARDER a cHiLD, on sii-Mn PLACE.

iMPPiovEMENT iNBoL-riNc' Fiona.

. u Specification forming part of Letters Patent No. 37,317, dated January 6,1863.

To ctZZ whom, it may concern:

Be it known that I,W1LLIAM F. (Joslin-Ann, of Springfield, in the count-yet' Clark and State oi Ohio, have invented a certain new and useful Method of Bolting Flour, (Case A,-) of which the following is a full, clear, and exact description, reference being had to the accompanying drawing, making part of this specification, which represents a Vvertical, longitudinal section through a bolting-chest to which my improvements are' applied.

In the ordinary course of milling, the superne iour is made on the head of the first, while the iiour made on the tail of the first and `throughout the whole of the second reel is returned to the head of the first reel, to be re-` bolted. The nature of the meal is such that in order to bolt it to the best advantage it is essential that the offal be kept in it during the process, otherwise the boltingcloths would soon become choked. The sharp cuttingedges of the o'al scour and clean the cloths, and also keep the meal lightened up. Moreover, it requires all the offal that is in the wheat to 'make it bolt well. Therefore when all the flour .made upon the tailend of the first reel, and

the whole of the second, is returned Without any offal in it to. the head of the first reel it becomes necessary to use a coarse cloth uponA the `iirst reel to avoid choking it. To avoid this objection, :instead of separating the iiur and oi'al and returningtheformer to the head 0i' the rst reel, I- keep the offal running through the entire series of reels without returning the ilour at all, by which means the proportion of ofi'al is rapidly increased, thus enabling me to usea series of bolting-cloths of increasing4 neness without danger of their choking. The oial, after passing through the series of reels, is conveyed into a separator, which assorts the various grades. This separator consists of a reclclothed with a series of cloths of decreasing iineness, the finest being at its head. The white middlings 7 come olf first, mixed with the ncst shipsm', then ship-stuit, shorts, and bran. These whitemiddlings are reground on a stone by themselves, and rebolte'd in the same manner as the meal. The our produced by bolting them through the first reel is mixed Vwith a suitable amount of'coarse offal from the separator, and then bolted'through a second and third reel, both of which are clothed with finer cloth than the first, the last being the finest of the three. The oli'al from the first reel is carried away nished, while that from the others is returned to tbesepar'ator. The flour from the white middlings may be conveyed into a separate retort or receptacleprepared for it, whence it may be mixed with the other iiour in any proportio-n desired, or be 'packed by itself.

In the accompanying drawing, which represents a convenient arrangement of parts for carrying out the objects 'of my invention, a

bolting-chest is shown consisting of three reels, arranged one above the other.

It is deemed -fnnnecessary here to describe in detail the construction and arrangement of the mechanism, as the invention claimed under this patent is not limited to such arrangement. The mechanism, moreover, is fully described in sundry other applications for Letters Patentled simultaneously with this, and marked, respectively, 13, 0, and lDJ The operation of bolting is as follows: The meal is fed into the pump D through a spout, C. rlhe pump inject-s the meal into the upper or superne reel, E, by which it is bolted. The 4cloth upon this reel is coarser than that 1 1; ed upon the lower ones. The bolting is assis ed by a strong blast from a fau,G. The ine oilr lmade upon this reel is conveyed away in any .proper manner into a sui tablereceptacle; The' oial falls into a dead-air chamber,E9, which is likewise provided with a suitable pump or `is repeated.' After passing through the third lreel the meal is too much impoverished to be again bolted with-"advantage in its present condition. It is therefore-passe through a separator, which divides it into-white middlings, ship-stud', shorts, and bramV The white middlings are reground, mixed with coarse eifel, and rebolted, as .hereinbetore described, thereby ,obtaining an increased quantity of flour, which muy be stored by itselformixed- 'with the other flour, as desired.'v The flour made on each reel is collected in a `sepemle receptacle. In some conditions of atmosphere the meel bol ts so freely that the several grades may all be thrown together,l but atothe'r'times it is more advantageous to keep thein's'ep'atrate.

In the drawingthe red arrows indicate the course taken by the flour in its passage through the chest, the blue ones the direction of the blast, and the 'black ones the course of the eifel.

What I claim lindert-his' patent as' my inmanner described.

2. Running the oEul through the entire `selries of reels, substantially in the mannerdescribed, for the purpose of making the our bolt more freely.

u 3. Rebolting the White middlin gs tlour after regrin'ding. and mixing them with oal, substantially in the manner described.

4. Gonductin g the Hour made upon each reel intoa separate compartment. substantially in the manner described', for the purpose of making all variety of grades, or of mixing them in any proportion desired, as set forth.

' In testimony whereof I have hereunto suby scribed my name. y

l WILLIAM F. GOCHRANE.

Witnesses:

' S. A. Bowyer-N,-

WARDER GUMMING. 

